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(No Model.)

H. P. CHAPMAN.

MIDDLINGS PURIFIER. No. 345,954. Patented July 20, 188 6.

UNITED STATES PATENT OFFICE.

HORACE P. CHAPMAN, OF AKRON, OHIO, ASSIGNOR OF ONE-THIRD TO SEBRA M.JONES, OF SAME PLACE.

MlDDLlNGS-PURIFIER.

SPECIFICATION forming part of Letters Patent No. 345,954, dated July 20,1886.

A Application filed October 21, 1885. Serial No. 180,537. (No model.)

To all whom it may concern.-

Be it known that I, HORACE P. CHAPMAN, a citizen of the United States,residing at Akron, in the county of Summit and State of Ohio, haveinvented certain new and useful Improvements in Middlings Pm-i tiers, ofwhich the following is a specification.

Myimprovements relate to brushes or cleaning devices whereby the meshesof the cloth or screen of a middlings purifier, flour-bolt, or similardevice are kept free, so as to allow the passage of the flour,middlings, and air.

My invention consists in a device for cleaning the screens of middlingspurifiers, in which the tufts of the brushes are secured to an endlessmoving belt, whereby they are moved across the under side of the screenin one direction, said belt being in turn secured to a carrier, wherebyit is moved across the screen in a direction transverse to its ownindependent movement, as hereinafter fully described, and moreparticularly pointed out in the claims.

In order that the invention maybe fully un derstood, I will proceed todescribe it with reference to the accompanying drawings, in which--Figure 1 is a vertical section of the cloth and cleaning devices. Fig. 2is a perspective view with the cloth removed.

I) b represent the cloth or screen of a middlings-purifier, and a a aseries of tufts or brushes mounted vertically upon an endless belt, 0,whereby they are moved across the under side of the screen, ashereinafter more fully described,said belt 0 beingin turn secured to andmoved across the under side of the screen in a direction transverse toits own movement by a carrier or belt, G, which is shown driven byrollers R R. The endless belt 0 passes over pulleys or sprockets D D,which are secured to the belt G through the medium of the base H, one ofsaid pulleys being journaled loosely upon its fixed axis d, while theother is secured to its axis d, which is journaled in the base H andcarries at its lower end a pinion, P. Between the rollers B is supportedrigidly a rack-bar, B, whose teeth engage the teeth of the pinion P onaxis d. It will be observed that the result of this arrangement is, thatthe belt 0 during the movement of the brushes in contact with the cloth(in other Words, when in the posimount a rotary brush upon a carrier towhich a reciprocating movement is imparted, the axis of the brush beingprovided with a pinion, which meshes with acorresponding fixed rack,whence it derives its rotation.

Having thus described my invention, the following is what I claim as newtherein and desire to secure by Letters Patent:

1. The combination, with a screen and an endless belt traversing theunder side thereof in one direction, and having brushes secured thereto,ot' a carrier to which said belt is secured, whereby it is made totraverse the screen in a direction transverse to its own movement,substantially as set forth.

2. The combination, with the screen and a carrier traversing the underside thereof, of an endless belt having brushes secured thereto,

pulleys or sprockets over which said belt passes, a pinion, and a fixedrack with which said pinion engages, whereby the endless brush-carryingbelt is made to traverse the under side of the screen in a directiontransverse to that in which it is moved by the carrier, substantially asset forth.

3. In combination with a screen, an endless belt, a brush arrangedparallel to the screen, pulleys or sprockets supported thereon, a secondendless belt on said pulleys or sprockets transverse of said first belt,aseries of brushes mounted on said second belt, and means for operatingboth belts, substantially as described.

4. In combination with a screen, a main brush-supporting belt, asecondbelt supported transversely on the first and carrying brushes,substantially as described, pulleys or sprockets for operating saidsecond belt, and a pinion and rack for operating said pulleys orsprockets by the motion of the first belt, substantially as set forth.

HORACE P. CHAPMAN.

\Vitnesses:

H. G. SANFORD, S. M. J ONES.

